Maths practice for 12-year-olds - page 252 of 348
Number of problems found: 6957
- Difference 5436
Find two integers whose sum is less than their difference. - Remainder A is an arbitrary integer that gives remainder 1 in the division with 6. B is a random integer that provides the remainder with division by two. What makes remainder in a division by three products of numbers A x B?
- Driver
I drive at an average speed of 70km/h. I drive 10 thousand km. How long did it take me? - Perpendicular 5424
A regular perpendicular quadrilateral prism with a base edge of 10 cm has a volume of 10 dm³. What is the height of this prism? - Guppies
Audrey has some guppies in a fish tank. The ratio of the orange guppies to silver guppies is 3:5. She has 12y orange guppies. Write the number of silver guppies she has in terms of y - Surface area of the top
A cylinder is three times as high as it is wide. The length of the cylinder diagonal is 20 cm. Find the exact surface area of the top of the cylinder. - Orchard 5421
The orchard has 600 apple trees. On the first day, they cut 1/5 and 2/8 of the total number of trees on the second day. How many more trees do they have to harvest? - triangle 5420
Two pairs of parallel lines, AB to CD and AC to BD, are given. Point E lies on the line BD, point F is the midpoint of the segment BD, point G is the midpoint of the segment CD, and the area of the triangle ACE is 20 cm². Determine the area of triangl - Difference 5419 Peter said to Paul: "Write a two-digit natural number with the property that if you subtract from it a two-digit natural number written in reverse, you get the difference 63. Which number could Paul have written?" Specify all options.
- Repeating digits There is a thousand one-digit number, which consists of repeating digits 123412341234. What remainder gives this number when dividing by nine?
- Schoolmaster 5412
The schoolmaster has a classroom schedule where the linoleum needs to be replaced. The classroom floor is a 45mm x 65mm rectangle on a 1:200 scale plan. How much will linoleum cost if 1 square meter costs €13.80? - MO Z6-I-2 2017
Erika wanted to offer chocolate to her three friends. When she took it out of her backpack, she found that it was broken, as shown in the picture. (The marked squares are identical.) The girls have agreed not to break the chocolate anymore and will draw l - Cyclo trip
Eighth-graders took a full-day trip on a cycling course. They took 1/7 of the route to the first break and added another 3/7 of the route to lunch. They had 18 km left to the finish. How many kilometers was the trip route measured? - Pears
There were pears in the basket. I took two-fifths of them and left six in the basket. How many years did I take? - Closest natural number Find the closest natural number to 4.456 to 44.56 and 445.6.
- Boys and girls
There are 28 girls in the hall. 5/7 of all children are boys. How many children and how many boys are there? - Groups
In the 6th class, there are 60 girls and 72 boys. We want to divide them into groups so that the number of girls and boys is the same. How many groups can you create? How many girls will be in the group? - Travel 5392
The car will travel 28 km in one hour. How much will it go in two and a half hours? - Holiday trip
Pavel is saving for the holiday trip. He received 1100 CZK from his father. He saved a fifth and received the rest 500 CZK from his mother. How much did his holiday trip cost? - Warmer weather
This morning it was -6 °C. What temperature did the thermometer show yesterday if it was three times warmer?
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